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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Grover Swartzlander
  • Vol. 30, Iss. 4 — Apr. 1, 2013
  • pp: 1017–1021

Population transfer and generation of arbitrary superpositions of quantum states in a four-level system using a single-chirped laser pulse

Zhenhua Zhang, Xihua Yang, and Xiaona Yan  »View Author Affiliations


JOSA B, Vol. 30, Issue 4, pp. 1017-1021 (2013)
http://dx.doi.org/10.1364/JOSAB.30.001017


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Abstract

We propose a scheme for coherent control of population transfer and arbitrary superpositions of quantum states by a single-chirped laser pulse in a Λ-type excited-doublet four-level system. It is shown that selective, efficient, and robust population transfer from the initial state to the target states (excited or ground) can be achieved via chirped adiabatic passage when the pulse bandwidth is smaller than about 1/10 of the energy separations between the excited-doublet levels and between the ground states. Moreover, arbitrary coherent superpositions between the excited-doublet states, or between the higher ground state and either of the excited-doublet states, can be created by appropriately tuning the chirp rate and detuning the laser field. The proposed flexible method of coherent control of population transfer and arbitrary superpositions between the initially unpopulated states requires only a single pulse, and is robust against variations in the laser parameters, which has potential applications in quantum information processing.

© 2013 Optical Society of America

OCIS Codes
(270.0270) Quantum optics : Quantum optics
(270.5585) Quantum optics : Quantum information and processing

ToC Category:
Quantum Optics

History
Original Manuscript: November 21, 2012
Revised Manuscript: January 27, 2013
Manuscript Accepted: February 28, 2013
Published: March 25, 2013

Citation
Zhenhua Zhang, Xihua Yang, and Xiaona Yan, "Population transfer and generation of arbitrary superpositions of quantum states in a four-level system using a single-chirped laser pulse," J. Opt. Soc. Am. B 30, 1017-1021 (2013)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-30-4-1017


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